I am having the following data in a filed posC N (8,2). The Highest among it is 561 and occurs four times in the entire records. The next higher is 549. I need to have difference of 10 points in each next lower digit. So in place of 549 in need 551. Similarly , next higher is 545 that occurs two times , I need 541 for both 545 and like wise

How it will be done ?

23
23
179
293
389
536
23
230
338
446
561
23
222
338
446
561
23
149
23
68
23
23
183
223
341
381
386
431
465
471
501
545
551
23
195
243
375
460
539
23
195
243
375
460
539
23
149
23
68
23
23
293
388
512
543
549
23
292
386
532
23
532
23
23
162
223
341
381
386
431
465
471
501
545
551
23
168
241
375
460
539
23
171
241
375
460
539
23
168
241
375
460
539

Regards